diff options
| author | Simon Glass <sjg@chromium.org> | 2015-01-05 20:05:33 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-01-29 17:09:51 -0700 |
| commit | 838aa5c94adc0da95c858ef70271078fd18dc4c9 (patch) | |
| tree | 45057746758a6303ce920f26e3ecf254d7a8e584 /drivers | |
| parent | 32f8a19f6d9aa551dc64868fac4b662c088dfb1f (diff) | |
| download | u-boot-imx-838aa5c94adc0da95c858ef70271078fd18dc4c9.zip u-boot-imx-838aa5c94adc0da95c858ef70271078fd18dc4c9.tar.gz u-boot-imx-838aa5c94adc0da95c858ef70271078fd18dc4c9.tar.bz2 | |
dm: tegra: Add a GPIO translation function
This deals with the polarity bit and selecting the correct bank device
given a GPIO number.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/tegra_gpio.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/gpio/tegra_gpio.c b/drivers/gpio/tegra_gpio.c index 88f7ef5..43928b8 100644 --- a/drivers/gpio/tegra_gpio.c +++ b/drivers/gpio/tegra_gpio.c @@ -21,6 +21,7 @@ #include <asm/arch/tegra.h> #include <asm/gpio.h> #include <dm/device-internal.h> +#include <dt-bindings/gpio/gpio.h> DECLARE_GLOBAL_DATA_PTR; @@ -251,6 +252,22 @@ static int tegra_gpio_get_function(struct udevice *dev, unsigned offset) return GPIOF_INPUT; } +static int tegra_gpio_xlate(struct udevice *dev, struct gpio_desc *desc, + struct fdtdec_phandle_args *args) +{ + int gpio, port, ret; + + gpio = args->args[0]; + port = gpio / TEGRA_GPIOS_PER_PORT; + ret = device_get_child(dev, port, &desc->dev); + if (ret) + return ret; + desc->offset = gpio % TEGRA_GPIOS_PER_PORT; + desc->flags = args->args[1] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0; + + return 0; +} + static const struct dm_gpio_ops gpio_tegra_ops = { .request = tegra_gpio_request, .direction_input = tegra_gpio_direction_input, @@ -258,6 +275,7 @@ static const struct dm_gpio_ops gpio_tegra_ops = { .get_value = tegra_gpio_get_value, .set_value = tegra_gpio_set_value, .get_function = tegra_gpio_get_function, + .xlate = tegra_gpio_xlate, }; /** |